Locomotive-boiler furnace.



C. B. MOORE. IJOCOMOTIVE BOILER FURNACE. APPLICATION FILED P131114, 1912.

Patented Nov. 3, 1914.

file/7%. bum 0 ii id: ED STATES PATENT ornicn.

oneness s. ruootrs, or EVANSTON, ILLINOIS, essronor. ro AMERICAN ARCH CGM$ABTJEL (I? NEW YGEK, N. Y.,

A CORPORATION OF NEW YORK. .i

LOCQMOTIVE-BOILEB FURNACE.

Specification of Letters Eaten/e.

Patented. Nov. 3, 1975A.

To all who 2p it mog concern Be itlrnown that I, Genuine B. Moons, a. citizen. of the United States, and a resident of thecity of Evanston, county of Cook, and

State of Illinois, have invented certain new and useful Improvements in Locomotive- Boiler Furnaces, of which the following is a specification.

My invention. relates to improvements in locomotive boiler furnaces and has special referenee to improvements in refractory bar-- or deflecting Wells commonly called arches for the fireboxes of locomotive boilers.

The general objects of my invention are to provide an improved wide span refractory arch which may be quickly and easily installed in locomotive boiler furnaces and which shall. be of relatively light weight and low cost; to provide an arch which shall be so constructed that repairs can easily be insi tiercto. whenever necessary; to provi sectional arch parts'of which, though to some extent interlocked, can be removed Without disturbing the remainder, to afford convenient access to the side sheets and the hue sheet of the firebox for repairing same; an d to provide an arch of such a form that it assists in mixing and igniting the firebox and the particles of fuel and. smoke carried thereby.

it further and special object of my invention to provide an iinproved arch of the character herein indicated which shall. be adapted for use in locomotive lireboxes having :1. wide span. in cases where there are tel-mediate supporting means between thereof. ill further object of my invention is ovido rcit'ractorv span and panel bricks all size for peso g through the doorof a locomotive firebox and formed to l; together and inter-lords, panel bricks with span bricks, to form an arch oi the character dose ibed which Sl'lilll be substantially integral "for operative service and multipartite for repairs.

iriy invcnthon consists in the several improvements. the various "features of construc tion and the combinations of parts by means oli'ivhich. the above and other objects are attained, andall as heroine cor tl'ully described and particularly pointed out in the claims. I

In the accompanying drawings illustrate preferred embodiment of my inven tion: Figure l is a vertical central. longitudinalsection of the firebox; Fig. S3 is ahorizontel longitudinal section on the line 22 of Fig. '1; Fig. 3 is a vertical cross section of the firebox back of the arch on the line 3-3 of Fig. 1; Fig. lis a cross section of the arch on line b-4 of Fig. 1; Fig. 5 is a crosssection of the lair-ch on line 5-5 of Fig. 1; and Fig. 6 is an enlarged fragmentary sectional View on the lifie 6-6 of Figs. 2 and i.

Although I. hevechosen to illustrate my invention as embodied in a front arch, I wish it to be understood that my invention is not thus limited, but is capable of embodiment in arches occupying various positions in the firebox and having somewhat differ ent functions.

A locomotive firebox, as illustrated in the drawings, comprises a flue sheet 2, side sheets 3, a rear sheet i and acrown sheet 5. A grate 6 is provided in the lower-part of the firebox and a fuel door or opening 7 is provided in the rear sheet. Leading forward from the flue sheet 2 are a plurality of fines ducted away from the firebox. A front arch es ordinarily used in a firebox is mounted in an inclined position between the fuel bed and the fines with its lower edge substan' tially abutting the lower portion of the flue sheet. Openings are usually provided between the arch and the flue sheet for the downward escape of cinders and other ma terial that would otherwise tend to collect on the upper side of the arch.

The usual purpose and function of a front arch, as ordinarily installed is to beliie or obstruct the direct flow of the fuel gases from to flow backward and forward in the firebox and thereby distribute their heat over the entire interior surface of the firebox and especially over the whole length of the crown. sheet.

My improved arch is characterized by spaced pairs of complementary refractory arch span bricks longitudinally ribbed and grooved on their upper sides and extending from side to side of the firebox, in conihinatiori with a plurality of refractory cover bricks or roof panels grooved on their undersides ..djucent to their transverse edges, to inlerioclc with the cor- 8 by which the gases of combustion are conthe fuel bed to the lines and cause said gases supported thereby and with square corners and rectangular cross responding ribs and grooves on the span bricks.

In the specific embodiment of my invention illustrated in the drawings, the deiicctor arch 9 as a whole consists of a plurality of pairs of span bricks A and a. plurality of intermediate bridging rows of panel bricks ll ting upon and interlocking there 'ith. F on of the span bricks A suitably formed on its lower outer end A to rest upon suitable supporting shoulders oi lugs 10 secured to the side sheets The upperends A of said. span bricks are preferably beveled to abut substantially squarely together and are provided with suitable engaging or interlocking means as tongues and grooves preferably arranged as a half tongue A and a half groove A on each brick adapted to coact with the corresponding half tongue and groove on the opposite brick. Each of the span bricks A is provided with suitable means for definite engagement with the panel bricks B, said means preferably consist ing of shoulders or ribs A formed longitudinally along the outer edges of the upper side of the span bricks A and adapted to coact with corresponding means as downwardly facing grooves B on the undersides of the ove lapping ends B of the panel bricks l3. Thus deflector arch 9 consists of two upwardly and convergently inclined sides, roof portions or halves abutting to gethcr at their upper edges and supported at their lower edges in substantial contact with the side sheets 3. ilach of these portions or halves is composed of a plurality of span bricks A and a plurality of panel bricks B as described.

In order to secure simplicity of form and corresponding facility to manufacture and use the parts constituting the subject matter oi niy invention, I prefer to form the span bricks A with a substantially rectangular cross-section and with a single broad longitudinal hollow or groove A on its upper side bordered by the lateral upstanding inbegral ribs A of rectangular cross section. I form the hooked on interlocking ends of the panel bricks B of full thickness section. and form a rectangular groove B in the underside thereof adjacent to the edge both at the forward and rear ends, of a depthcorresponding with that of the groove A in the span bricks, and wide enough to readily rece ve the upwardly projecting rib A ot the span brick. I make the groove A auiplywide enough to receive the double row of hooks or ribs B bordering the grooves ll of the adjacent coacting panels B lying on opposite sides of an intermediate pair of span bricks. 'lhe panel groove B is preferably formed only wide enough to give ample clearance for the rib A of the i span brick. This form and arrangement of the interlocking means assures a definite interlocking relation between the span bricks and the panel bricks. The panel bricks ll are preferably of plain rectangi lar slab-like shape, and are preferably made as large may be readily passed through the door of the firebox without being too heavy for convenient handling. As these arches wide spans, it is generally preferable to arrange the panels in transverse rows of two of more on opposite sides of the arch between adjacent pairs of span bricks, such rows being in alinement and forming a continuous row extending from side to side of the firebox. Each of the panel bricks B is made relatively light and thin in order that the arch as a whole may be as light as po ible.

As the arch is inclined upwardly and rearwardly the apex only of the forward orlower end of the arch engages the flue z-lllPQi as at the point 12. The front edges of the arch diverge slightly away from the flue sheet in both directions from the central point 12, leaving openings 13 between the arch and the sheet through which any materials deposited on the upper side of the arch may escape downwardly upon the fuel bed. I

As the undersurfaces of the span bricks A. areinclined corresponding to the inclination oi? the arch, the bearing lugs 10 therefor are arranged in an inclined row. Supplementar r lugs 10 are provided on the side sheets adjacent to the lugs 10 just in front of the position for the outer ends A of the span bricks A to prevent the latter from slipping forward oil from the lugs 10.

3 the construction which I have described. the transverse span bricks A and the cororing panel bricks B form large tranwerse downwardly facing pockets and lmil cs adapted to retard and mix the firebox gases as they flow upwardly and re'arwardly.

thereunder. Moreover, each of the panels B is provided with a supplementary down wardly facing pocket B on its underside formed dcepnfid wide enough to leave only light thin walls. This structure renders the panel light in weight without materially impairing its strengtn as its side walls serve to reinforce it. These relatively small pockets, positioned in the roof of the larger main pockets, assist materially in the mixiug of the firebox gases,.- Arches made in accordance with my invention serve to mix the gases and tend to prevent and break up 'stratification thereof and to reta'd the flow thus facilitating and insuring more com: plete ombustion of the fuel and prevention of the formation. and escape of smoke.

are designed for use in particularly The purposes of the arch are usually answered by constructing the arch long enough aliases to ext nd substantially to the center of the lire}; i which case two rows of panels sullice, though in some cases a shorter csisting of a single row may be able. 7 ,Jnstructing niy improved arch, I first a pair of span bricks A in position adaccnt the flue sheet 2 with their outer ends Ii. resting on the lugs 10 provided therefor. inert place a similar pair of span bricks on other a suitable distance to the rear of the first pair and then place the panel bricks B thereon with the grooves on said panels and the corresponding ribs on the span bricks in en ageinent.

As modilications of the above described embodiment of my invention will readily occur to those who are skilled in the art,

.do not wish to be limited to the specific form of structure herein set forth.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

l. In a locomotive firebox, an inverted V- shapcd refractory arch structure suitably supported at its lower or outer side edges and consisting of two oppositely inclined roof portions wedgingly abutting at their upper or inner adjacent edges, each of said root portions being composed of a plurality of transverse rows of refractory panel bricks having, downwardly facing grooves formed in the under sides of their transversely extending edges, in combination with a plurality of span bricks extending transversely of the firebox beside and partly beneath said panel bricks to support them and having up- 'wardly projecting ribs on their front and rear edges to engage the grooves on said panel bricks to hold the said panel and span bricks in definite relation.

2. in a locomotive firebox, a wide span arch comprising a plurality of pairs of compleinentary supporting span bricks, the bricks of each pair being wedgingly positioned end to end in arched position and extending transversely between the side sheets, and one or more transverse rows of panel bricks with their front and rear edges resting; on adjacent supporting spans, said span bricks each having an upwardly facing-central longitudinal groove on its upper side and said panel bricks each having a down wardly facing groove in the under side of each of its bearing edges, the coacting edges of each brick fitting intoithe corresponding grooves of the adjacent bricks.

3. In a locomotive firebox having a flue sheet at the front end, a rear sheet having a doorway therein at the opposite end, side sheets on opposite sides and suitable arch supporting means secured to the side sheets at the forward end of the firebox adjacent to the flue sheet, a Wide span. refractory arch its outer edges on said supporting means, said arch comprising a pair of up ivardly and convergently inclined sides abutting at their upper edges in arched relation and suitably formed at their low outer edges for resting upon said supporting means, and sides each consisting of alternate span bricks and rows of panel bricks resting thereon and interlocking therewith at their edges, the respective upper and lower engaging edges of said span and panel bricks being corresphndingly ribbed and grooved for detachable positive engagement with. each. other, and the corresponding span bricks of opposite sides of the arch being formed to lit positively together in end-to-end abutment.

4. A refractory panel brick for locotootive firebox arches consisting of a substantially plain rectangular slab of a size con; venient for passing through the firebox door and having a downwardly facing pocket formed in its underside and having a downwardly facing groove extending across the under side of each end forming thereon substantially an anchoring hook for securing the brick in place in the arch.

In a lomoniotive firebox a wide span refractory arch comprising a plurality of pairs of complementary span bricks, the members of each pair being wedgingly positioned end to end in arched relation. and extending transversely between the side sheets, said pairs being spaced apart, and a plurality of panel bricks resting thereon, said span bricks having projections integral therewith at their edges to detachably inter-- lock with complementary projections formed integral with the edges oi the panel bricks and thereby interlock the said panel bricks and'the said span bricks in determined relative position.

6. In a locomotive firebox an arch suitably supported at its side edges and com sisting of two upwardly and convergently inclined portions abutting together at their upper edges, each of said portions being composed of one or more transversely positioned rows of thin slab-like panel bricks and a plurality of long, narrow span bricks lying between and at the sides of said rows of panel bricks partiallybeneath and in coactive supporting relation. therewith, said panel bricks and span bricks having formed on the under and upper sides respectively of their adjacent edges integral complementary projections and recesses positively retaining the panel and span bricks in definite position,

i, in a locomotive firebox an inverted V- shaped refractory arch structure suitably supported at its lower or outer side edges are bricks having recesses in the under sides of their transversely extending edges, in c0111- bination with a plurality of spam bricks ex tending transversely of the firebox, adjacent to and partly beneath said panel bricks supporting them, and having upwardly extending projections 0n-.- their forward and rear edges interlocking With the said recesses in the span bricks to hold the sai" CHARLES B? MOURE. Witncsscs 1 JOE-11? E. Lnr'nvnn, M. SIMON. 

